A rattling noise from the engine may indicate that the timing chain cassette is worn. Our technicians tell us that installing an updated cassette and timing chain tensioner should correct this concern.Google+
Car Problem Reports
Ford Explorer Sport Trac Worn Timing Chain Cassettes May Cause Rattling Noise From Engine
Ford Explorer Sport Trac Problem
Engines Affected: 4.0L V6, 4.0L V6 SOHC
Average Mileage: 126,765 mi (70,000 mi - 240,000 mi)
Visitor, 2001 Ford Explorer Sport Trac, 200,000 mi
nasty rattle, no obvious source. No check engine light on.
Visitor, 2002 Ford Explorer Sport Trac, 81,000 mi
Noise from motor, timing chains and guides were bad
Visitor, 2004 Ford Explorer Sport Trac, 108,000 mi
Non-rythmic rattling behind passenger side valve cover.
$3400 just for one side!!!!
Visitor, 2002 Ford Explorer Sport Trac, 120,000 mi
A piece of the timing chain cover came up through the valve cover. Truck was still running!!
Visitor, 2004 Ford Explorer Sport Trac, 70,000 mi
worn cassette, dealership wants over $3000 for repair but are recommending that i buy a new motor from them and they will install it for me for around $4500
Visitor, 2007 Ford Explorer Sport Trac, 4.0L V6 SOHC, 96,500 mi
Im hearing a rattling noise under the truck and think that it may need a timing chain . I have 96000 miles on truck and its never been changed
Visitor, 2001 Ford Explorer Sport Trac, 123,000 mi
timing chain broke causing metal to enter motor. motor blown